Improving urban living conditions in the areas of housing, water and sanitation will go a long way to mitigating health risks.

改善城市住房、供水和卫生等生活条件将大大减少健康风险。

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"The paper Brad has written has quite a high value, but there is a long way to go, " says the World Wildlife Fund's Ashok Chapagain, who has been studying water footprint methods for over five years.

世界自然基金会的Ashok Chapagain，这个已经研究了如何定义“水足迹”这一概念方法将近五年的科学家说，布兰德所发表的论文价值很高，但是这还远远不够说明问题。

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You have to go quite a long way past that point to bring back the clear-water ecosystem.

你必须经历一个非常漫长的过程才能通过那个能恢复到清水状态的生态系统的临界点。

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The systems are especially useful for those who are too sick to go a long way for water.

VOA: special.2009.07.27

Howard Snowden, managing director of Jersey Water, said there was a long way to go as the islands reservoirs were still 60% empty.

BBC: Jersey water stocks improved by heavy rain

"Rivers, streams and lakes are measurably cleaner than they were before the Clean Water Act, but we still have a long way to go, " said Bob Irvin of the World Wildlife Fund, the world's largest privately funded conservation organization.

CNN: Challenges ahead for a changing Earth

They are trying to make sure the government's promise of water does not go the way of past white men's promises, which left them where they are: high and dry.

ECONOMIST: Indians versus greens